The study of the baryon resonance is one of the most important topic in the hadron physics.
The long standing puzzle of “ missing resonances ” is still unsolved [1]}, [2]}.
A lot of excited nucleon resonances predicted in the quark model have not been observed in the experiments.
One possible reason is that these resonances may be too broad to observe, or the proper reactions which have significant signal of the resonances have not been explored experimentally yet.
Especially, the information of the nucleon resonances with mass heavier than 2 GeV is still very limited.
